Water grate



Nov. 16 1926.

WATER GRATE File@ July 551923 Patented Nov. 16, 1926.

JOHN G, GIBSON, OF VENTNOR, NEW JERSEY.

WATER GRATE.

.Application med July 5. 1923.y serial No. 649.487.

Y' installed in existing boilers without effecting change in the construction thereof. Other and further-objects relate to the provision of general details of construction and in the arrangement and combination of parts hereinafter setforth. Y v

The invention consists of the improvements hereinafter described and finally claimed.

The' nature, characteristic featuresv and scope of theinvention will be more fully understood from the following description taken in vconnection with the'accompanying drawings forming part hereof, and in which:

Fig. 1,is a top view partly sectioned of pair of detachable grate-bars.

Fig. 2, is a view in section taken upon the line 2 2 of Fig. 1 y

Fig', is a top view of a slightly modified formof grate-bar construction..

.Fig 4L, is a .view in section taken upon the line 4-4 of Fig.V 3,

Figs. 5 and 6 are views` in plan andv crosssectio-n, respectively, of aV further modified form of grate construction, and

Fig. 7, is a fragmentary View illustrating the grate-bar as shown in Figs. land 2 formed integral with the water leg of a boiler section. Y L For the purpose of illustrating my invention I"have shown in the accompanying' drawings several forms which are at present preferred =by me, since the lsa'merhave been found in practice to give satisfactory and reliable results, althoughit is to be understood that the'various instrumentalities of which my invention consists can be variously arranged and organized and kthat my invention is not limited to the precise arrange` ment. and organization of the instrumentalities as herein shown and described.

In the water-grate claimed in my Patentv having perforated domes.. In the present instance thesesections are omitted and the grooves of adjacent grate-bars form tubular,

channels for the passage of air to the grate surface. The grooves however donot ex tend through the top of a grate-bar as shown in my said patent and Vwhile the flanges at the lower end of the" grooves may remain it is preferable in 4some cases Vto omit same. l/Vith the exception of 'these changes the general arrangement of grate-bar is similar tothat disclosed in patent aforesaid.

Referring'now to the drawings, -10 designates a grate-bar which is Vvhollow for'the circulation of water therethroughy as is well understoodin the art. Each side wall of a grate-bar 10 is vertically grooved from the V UNITED sTATEs PATENr-orFic-E. i

bottom thereof to Awithin' a short distance of v the top thereof. `These grooves which may ledges of grate-bars form dome-like tops for Abeof any desired shape are spaced apart and tit) vthe air channels as formed by grooves 11'.

yThese domesareapertured, as at 173 for the passage.v of air, under pressure, in the form ofv jets. The openings are arranged at an inclination so that thev jets of air may spread.

over the grate area `insteadof being forced .Y

directly through arfbed'of coals which latter` is not desirable sincean equal distributionof air is ynot obtained and the tendency is to y 'cause a. 'bed of coals tol burn much yfaster in someplaces than in others.` -By `properly spacing the grooves and providing the A Vapertured domes ,as Vdescribed l'no Vsuch `ill effects are experienced but'a well balanced `distribution ofair jets obtained. In Figs.`

and 4 instead of the .top edge of a grate" each groovev 11, the top surface ofa gratebar is plane.,V That part of ak grate-bar` 'or ledge, which overhangs the groovesv 11' is designated 14: in said Figs. 3 and Lland is apertured as at 15. These apertures Vmay if desired be arranged at an inclination al-V though this is'not always'practiced in this style of grate-bar. Y Q

Oneigrooved face of each of the above described grate-bars isprovidedwith horizontally disposed, spaced recesses 16, there beine` a recessed Jortionbetwe'en ad'acent. T1 grooves 11. The opposite .grooved face'ofV each ofthe above described vgrate-bars is bai-'being formed upon afcurved line above Y provided with horizontallyY disposed, spaced l ribs 17 adapted to co-actively .engage with said re'cess'edportions 16 whereby adjacent or abutting Lgrate-bars inay be interlocked.

These recessed and ribbed portions yforinV 'overlapping parts to preclude air seeping as before described. In practice'ce'inent or the like may be app-liedbetiveen the adjacent faces Yof grate-bars. VThe side Walls ofe t y 'ge-bar oi each type are shaped to follow the curves the grooves 11 so that approxii; '.tel-y ,the saine thickness of metal is present throughout av grate-bar to provide for uniformity of cooling surface. rlhe thickness of the over-hungportionsis ofapproXiinately the saine thickness as 'the Walls of a grate-bar. Referringv now to Figs and 6 each gratebar is provided iipon one side ivallavith grooves .11sirnilar to those abov-e describedand is provided upon its vopposite side /ivallfivith grooves 18 which extend through the grate-bartop yin the saine inanvner asjthose shovvn in my aforesaid patent. "lhese Agrooves are recessed orv countersunk at their tops as at 19. At their bottoms each Vset of grooves are provi-ded With flanged parts 20. The grate top upon that side provided with grooves-11* is provided with laterally disposed fiangedparts 21 which fnotfonly ,overhang said grooves l11 but are 'further extended to seat Within therecessed YorV c'oiiiit'ersunl; parts 20 of grooves 18 ofan adJacent grate-bar., These flangesV 21 are Vseinioircular, asrtlie,recessed parts 19, and

are apertiired as Vat 22,r for the passage of lai'rft'o 'the grate surface. A particular ad vantage derived from thisltype of lconstruction is that iff a flanged part 21 fractures as at 23,- see Fig. 6, one of the hollow ineinbers ivith perforated domes as ydi's'cl-osedin iny aforesaid patent and designated in Fig.

6, as 241, may be introduced Within vthe chann'el as vtorined by grooves .18-11 and seated Vupon flanged 'parts 20. .Thisv avoids substiuitingv a new grate-bar. Any ofthe above described types of Vgrate-bars may be cast integral .with a u'zateileg?rr of a boiler, as lshownfin Fig. 7. vThe type as illustrated in Figs. 1 land 2 is used Yfor."illustrative purposes. f Y.

Itvvill now be apparent that I have de- 7 vi'sed a novel and useful construction which edges o root/,25e

einbodi js the features of advantage enumerated desirable in the stateinent of the invention and the above description and While l1 have in the present instance shown and des ribed the preferred einbodiinents thereof which have been found in practice to give satisfacto" and reliable results, it is Sto be undeiWood that the saine are susceptible o l iiiodiiicati-on in various particulars Withdepai aan' frein the spirit-pr scope of the invention orsacrificiiig any of its advantaues. V l

Y l claiin is: f Y. en a frate construction ofthe character stated a plurality of hollow grate-bars in cluding si-de Walls anda zovereach side ivall. being" vertically grooved so that the vgrooves of adjacent grate-barsforin a Y channels and a separate acter stated a plurality of holloiv gpratebar's 1 including side Walls and acover one side Wall each grate-bar being horizontally i'e.

cessed and the other side bein-g` :provided with a ribbed .portion for engaging an ad- 'jacent recessed portion,the side Walls of each grate-bar being grooved vertically so that adjacent `grooves forni channels and a separatenledge upon each side lthereof Vfor overhaiioing each groove, the said overhangingr p being perforated 'and the ineeting' i said lledges abutting.

3. In a ,girate construction of the character stated aplurality of hollow `4grate-bars including` side ivallsand a -cover 'each side ivall being vertically grooved' so that the Vgrooves of adjacent grate-*bars 'forirn a rplurality of spaced channels, each sidewallof a grate-bar haviiui` projected laterally from adjacent its top, a separate ledge' or flanged a circle for overhangi-ng said channels, the edges of opposed ledges abutting tofforin substantially dome-shaped parts vupon said channels and that portion ofeach ledge overhanging a groove being perforated.

ntestiinony whereof, I have hereunto 'signed iny naine.

JOHN `e. eiBsoN.

.porti-on formed iipivardlyiipon 'an arc of Y 

